The greatest race mare of them all was set to give birth to her first foal this month.

But her owners confirmed today Winx had lost the foal.

�It is with great sadness that the Kepitis, Tighe and Treweeke families wish to inform everyone that unfortunately overnight Winx lost her foal,� the statement said.

�There are so many people involved in the Winx story from owners, staff past and present to her many fans around the world. Our thoughts and attention at the moment are on Winx ensuring that she remains healthy, as anyone in this situation would respect.

� It is a traumatic time for a mother and those involved and Winx is now the centre of our attention following the loss of a beautiful filly this morning.

�We wish to thank everyone for their support and understanding, please respect the connections during this sad time and we will update you as soon as appropriate.�https://www.news.com.au/national/breaking-news/racing-the-greatest-race-mare-of-them-all-winx-has-lost-the-foal-she-was-set-to-deliver-this-month/news-story/9dbfd75c69bbeb6b5162deb0a6ef7188

Owners of champion race mare Winx have confirmed she is pregnant again, this time to Arrowfield stud stallion Snitzel.

The news comes just days before the highly anticipated sale of Winx's first foal on Monday, which is tipped to nudge multi-million dollar thoroughbred yearling records.

Part-owner Peter Tighe said it was an exciting next step in Winx's broodmare career and she was in good health.

Winx won a world record 33 straight races, including 25 Group 1 wins and a record four Cox Plates as part of her more than $26-million racing career.

She retired in 2019 to become a broodmare.

Winx lost her first foal to stallion, I Am Invincible, in 2020 before she gave birth to a Pierro filly in October 2022.

She visited Arrowfield's Snitzel last year, which led to the latest foal due this spring.

"[Snitzel] has been on the shortlist for a couple of years. You can only go to one a year," Mr Tighe laughed.

"We didn't want to leave it too much longer with Snitzel. He's not getting any younger and he throws such a high grade foal when you get one so that's why wanted to get one before his career ended.

The stallion's service fee of $247,500 is among the highest in the country.

Arrowfield Stud general manager Paul Messara was delighted Winx's owners chose Snitzel.

"He's been champion sire four times in the past, statistically probably the leading sire in the country in terms of stakes winners to runners," he said.

"He just has a fantastic record of producing top offspring, both fillies and colts.

"Obviously [Winx] is one of Australia's finest, and certainly a name in racing that everyone knows."

Mr Messara said next week's sale of the Winx filly would give a good gauge on what future progeny could be worth but was quick to add that the owners might not sell the next one.